<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="../bootstrap.min.css">
    <style>
        .red {
            color: red;
        }
    </style>
</head>

<body>
    <div id="app">
        <div class="container">
            <!-- 顶部搜索框模块 -->
            <div class="form-group">
                <div class="input-group">
                    <h4>品牌管理</h4>
                </div>
            </div>

            <!-- 数据表格 -->
            <table class="table table-bordered table-hover mt-2">
                <thead>
                    <tr>
                        <th>编号</th>
                        <th>资产名称</th>
                        <th>价格</th>
                        <th>创建时间</th>
                        <th>操作</th>
                    </tr>
                </thead>
                <tbody>
                    <tr v-for="v of list" :key="v.id">
                        <td>{{ v.id }}</td>
                        <td>{{ v.name }}</td>

                        <!-- 如果价格超过100，就有red这个类 -->
                        <td :class="{red: v.price > 100}">{{ v.price }}</td>
                        <td>{{ v.time }}</td>
                        <td><a @click.prevent="del(v.id)" href="#">删除</a></td>
                    </tr>
                    <tr v-show="list.length > 0" style="background-color: #EEE">
                        <td>统计:</td>
                        <td colspan="2">总价钱为: {{ totalMoney }} </td>
                        <td colspan="2">平均价: {{ avgMoney }}</td>
                    </tr>
                </tbody>
                <tfoot>
                    <tr>
                        <td v-show="list.length === 0" colspan="5" style="text-align: center">暂无数据</td>
                    </tr>
                </tfoot>
            </table>

            <!-- 添加资产 -->
            <form class="form-inline">
                <div class="form-group">
                    <div class="input-group">
                        <input v-model.trim="name" type="text" class="form-control" placeholder="资产名称" />
                    </div>
                </div>
                &nbsp;&nbsp;&nbsp;&nbsp;
                <div class="form-group">
                    <div class="input-group">
                        <input v-model.number.trim="price" type="text" class="form-control" placeholder="价格" />
                    </div>
                </div>
                &nbsp;&nbsp;&nbsp;&nbsp;
                <!-- 阻止表单提交 -->
                <button @click.prevent="add" class="btn btn-primary">添加资产</button>
            </form>
        </div>
    </div>
    <script src="../vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                name: "", // 名称
                price: '', // 价格
                list: JSON.parse(localStorage.getItem('list')) || []
                // [
                //     { id: 100, name: "外套", price: 199, time: new Date('2010-08-12') },
                //     { id: 101, name: "裤子", price: 34, time: new Date('2013-09-01') },
                //     { id: 102, name: "鞋", price: 25.4, time: new Date('2018-11-22') },
                //     { id: 103, name: "头发", price: 19900, time: new Date('2020-12-12') }
                // ],
            },
            watch: {
                list: {
                    deep: true,
                    handler(list) {
                        localStorage.setItem('list', JSON.stringify(list))
                    }
                }
            },
            computed: {
                totalMoney() {
                    return (this.list.reduce((sum, v) => sum + v.price, 0)).toFixed(2)
                },
                avgMoney() {
                    return (this.totalMoney / this.list.length).toFixed(2)
                }
            },
            methods: {
                del(id) {
                    // 把筛选出来的 剩余其他数据传给list
                    this.list = this.list.filter(v => v.id !== id)
                },
                add() {
                    // 判断用户输入是否为空
                    if (!this.name || !this.price) return alert('数据不能为空')
                    this.list.push(
                        {
                            id: Math.max(99, ...this.list.map(v => v.id)) + 1,
                            name: this.name,
                            price: this.price,
                            time: new Date()
                        }
                    )
                    // 清空表单
                    this.name = this.price = ''
                }

            }
        })
    </script>


</body>

</html>